EP 1350770 A1 20031008 - Optical glass
Title (en)
Optical glass
Title (de)
Optisches Glas
Title (fr)
Verre optique
Publication
Application
Priority
- JP 2002099810 A 20020402
- JP 2002282336 A 20020927
Abstract (en)
An optical glass suitable for precision press molding has a refractive index (nd) of 1.88 or over and an Abbe number ( nu d) within a range from 22 to 28, comprises, in mass %, <TABLE> and has a glass transition point (Tg) within a range from 500 DEG C to 580 DEG C. The optical glass preferably has a yield point (At) within a range from 550 DEG C to 640 DEG C.
IPC 1-7
IPC 8 full level
C03C 3/062 (2006.01); C03C 3/064 (2006.01); C03C 3/068 (2006.01)
CPC (source: EP US)
C03C 3/062 (2013.01 - EP US); C03C 3/064 (2013.01 - EP US); C03C 3/068 (2013.01 - EP US)
Citation (applicant)
- JP H01308843 A 19891213 - OHARA KK
- JP S5245612 A 19770411 - SUMITA OPTICAL GLASS
- JP 2000016830 A 20000118 - HOYA CORP
Citation (search report)
- [A] DE 19919802 A1 19991104 - HOYA CORP [JP]
- [X] PATENT ABSTRACTS OF JAPAN vol. 2002, no. 07 3 July 2002 (2002-07-03)
- [DA] DATABASE WPI Section Ch Week 197721, Derwent World Patents Index; Class L01, AN 1977-36929Y, XP002248866
- [A] PATENT ABSTRACTS OF JAPAN vol. 013, no. 072 (C - 570) 17 February 1989 (1989-02-17) & JP 2000016830 A 20000118 - HOYA CORP
Citation (examination)
DATABASE WPI Section Ch Week 199422, Derwent World Patents Index; Class L01, AN 1994-181800
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1350770 A1 20031008; CN 1204073 C 20050601; CN 1448353 A 20031015; US 2003191008 A1 20031009; US 6828265 B2 20041207
DOCDB simple family (application)
EP 03007075 A 20030328; CN 03108636 A 20030402; US 40478803 A 20030401